Do you have gud quality Audio cable or is it an improvised cable. Audio cables dont have much circuitry but will save you a lot of hassle if you spend 30-40 Rs. on a gud quality cable. And also remember to remove the Module wen connecting with Sim.

i bought it from market...
not DIY .....
also removed the module......
but no improvement.....

after connecting  transmitter  with mic o/p...
what to do?
transmitter should be on or off?

reply anyone plz....

for my transmitter the power switch was in off position and when I connected the audio cable it switches on automatically.